铝合金根据成分和工艺特点,可分为()和铸造铝合金。
In my company, all employees are expected to have a________attitude towards their co-workers.
A. cooperation
B. corporation
C. cooperative
D. cooperate
London has _________ 7.6 hours of sunshine per day during May.
A. in average
B. on average
C. at average
D. for average